Datasheet

Data Sheet
© 2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 3 of 11
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Unidirectional Link Detection Protocol (UDLD) and Aggressive UDLD allow unidirectional
links caused by incorrect fiber-optic wiring or port faults to be detected and disabled on
fiber-optic interfaces.
Availability and Scalability
The Cisco Catalyst 2350 Series Switches are equipped with a robust set of features that allow for
network scalability and higher availability. This is achieved through a complete suite of Spanning
Tree Protocol enhancements that aim to maximize availability in a Layer 2 network. Enhancements
to the standard Spanning Tree Protocol, such as Per-VLAN Spanning Tree Plus (PVST+), Uplink
Fast, and Port Fast maximize network uptime.
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IEEE 802.1s/w Rapid Spanning Tree Protocol (RSTP) and Multiple Spanning Tree Protocol
(MSTP) provide rapid spanning-tree convergence independent of spanning-tree timers and
also offer the benefit of Layer 2 load balancing and distributed processing.
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Rapid Per-VLAN Spanning Tree (RPVST+) allows rapid spanning-tree reconvergence on a
per-VLAN spanning-tree basis, without requiring the implementation of spanning-tree
instances.
Quality of Service
The Cisco Catalyst 2350 Series Switches offer the following QoS features:
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802.1p class of service (CoS) and differentiated services code point (DSCP) field
classification is provided, using marking and reclassification on a per-packet basis by
source and destination IP address or Layer 4 TCP/UDP port number.
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Cisco control-plane and data-plane QoS ACLs on all ports help ensure proper marking on a
per-packet basis.
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Four egress queues per port help enable differentiated management of up to four traffic
types across the switch.
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Shaped Round Robin (SRR) scheduling helps ensure differential prioritization of packet
flows by intelligently servicing the ingress queues and egress queues.
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Weighted Tail Drop (WTD) provides congestion avoidance at the ingress and egress
queues before a disruption occurs.
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Strict priority queuing helps ensure that the highest-priority packets are serviced ahead of
all other traffic.
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The Cisco committed information rate (CIR) function provides bandwidth in increments as
low as 8 Kbps.
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Up to 64 aggregate or individual policers are available per Fast Ethernet or Gigabit Ethernet
port.
Security
The Cisco Catalyst 2350 Series Switches support a basic set of security features, including the
following:
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Secure Shell (SSH) Protocol and Simple Network Management Protocol Version 3
(SNMPv3) provide network security by encrypting administrator traffic during Telnet and
SNMP sessions. SSH Protocol and the cryptographic version of SNMPv3 require a special
cryptographic software image because of U.S. export restrictions.